Assembling tool



Nov. 2, 1943. 1 A, PARKER 2,333,120

ASSEMBLING TOOL Filed Aug. 15, 1940 25W/infra@ www@ ma ,e

Patented Nov. 2, 1943 UNITED 44STATES PATENT OFFICE AssEMBLING TooL Y Arthur nrarker, cleveland, ohio` l Application August 15, i940, serial No. 352,788`

2 Claims.

The present invention relates to new and useful improvements in an assembling tool, and more particularly to improvements in a tool for applying a ferrule or holding sleeve to a tube.

The invention is particularly concerned with the assembling of tubes and ferrules of the type shown in my co-pending applications, Serial No. 262,965, filed March 20,1939, issued Aug. 5, 1941, as Patent, No. 2,251,716, `and Serial No. 264,812, led March 29, 1939, issued Aug. 5, 1941, as Patent No. 2,251,717. In this `type of tube coupling, the ferrule or holding sleeve includes a sleeve portion and an outward shoulder at one end of the sleeve portion. The outward shoulder cooperates with one of the coupling members and the `opposite end of the sleeve portion of the ferrule is forced into engagement with the tube by the other coupling member. The coupling members thus cooperate with the ferrules to tightly clamp the tube. In the rst application mentioned above, `tighteningof the coupling memlbersrelative` to one another causes one end of the ferrule to cut into the outer surface of the tube so as to provide tightl gripping engagement therewith. In the second application mentioned above, the tube is provided with a preformed peripheral groove into which one end of the ferrule is forced when the coupling members are tightened relative to one another.

Anobject of the present invention is to provide a relatively simple and easily operated tool `for applying a ferrule` or holding sleeve to a tube substantially of the type pointed out above.

Another object of the invention is to provide fa tool of theabove type wherein the tube with the ferrule loosely applied thereto is properly positioned in the path of a movable diemember which effects the desiredl gripping engagement between the ferrule and the tube.

A further object of the invention is to provide a tool of the above type wherein the positioning means for the tube is removable so as to permit use of the toolwith .various tube sizes.

A still further object of the invention is to pro- Vide a tool of the above type wherein a shift collet is employed for positioning the tube and wherein this collet and the movable die member are replaceable in pairs for various sizes of tubes.

The above and other objects of the invention will in part be obvious and will be hereinafter more fully pointed out.

In the accompanying drawing:

Figure 1 is a top plan View of the tool with a tube and ferrule positioned therein before t clamping movement of thedie member.

rearwardly extending lugs, I9,

FigureV 2 is a side view, in section, of the tool assembly shown in Figure 1.

Figure 3 is an end view of Figure 1, showing the collet. i i Y Figure'4 is an enlarged fragmentary sectional view showing the position of the tube having a preformed groove, and a ferrule before the ferrule is forced into engagement with the tube by the die member. i

Figure 5 is a view, similar to Figure 4, but showing the position of the die member after the adjacent end of the ferrule has been'forced into engagement with the preformed groove in the tube.

Figure 6 is a View, similar to Figure 4, but showing the application of a ferrule to a tube without any preformed groove before the ferrule is caused to engage the surface of the tube by movement of the die memember.

Figure 7 is a fragmentary detail sectional view of a modified form of die member wherein a central mandrel is employed for preventing collapsing of the tube during application of the ferrule.

Referring more in detail to the accompanying drawing, and particularly in FiguresV l, 2, and 3, the tool is illustrated as including a body portion I0 which may be supported on any suitable form of standard I I. At one end of the` body portion l0 of the tool, there is provided an upstanding endportion I2 `which is provided with a horizontal recessed portion I3 within which a die member I4 is mounted `for sliding movement.

The die memberis threadedly secured to a spindle I5 which extends through the end portion I2 and is provided with an enlarged head portion I6 normallyidisposed outside of the end of the body portion I0, as shown in Figures 1 and 2. The end I2 of the body portion I9 is provided with a recess I'l surrounding the spindle I5 and in which a coil spring I8 is mounted. The coil spring has one end thereof bearing against the body portion and has the opposite end thereof bearing against the enlarged head portion I6 for normally maintaining the spindle and die I4 in the retracted position shown in Figures 1 and 2. The body portion Il) is provided with a pair of spaced ISa which are apertured to receive apin 2U on which a lever 2I is mounted. The lever 2l is provided with a cam surface 2'Ia which is adapted to engage the enlarged head Iii on the 'spindle I5 toforce the spindle and the die `member inwardly when the handle is moved downwardly.

At the opposite end of the body portion I0 and spaced from the end I2, there are provided a pair of upstanding arms 22, 22a, which provide a U-shaped opening between the opposing surfaces thereof. A pair of horizontally spaced pins 23, 23a arey mounted on the arms 22, 22a, respectively, and extend inwardly toward the opposite end of the body portion A collet including a pair of members 24, 24a, are mounted on the pins 23, 23a, respectively, for pivotal movement within the` upstanding endsy of the body portion. Each part; of thevcollet is shaped to `provide a semi-circular recess between which a tube T is adapted to be clamped.

The collet member 24 is provided with a vertical recess 25 extending substantially ratrightv angles to the axis of the tube T and in which a threaded pin 26 is pivotally mounted, as at 2l. The collet member 24a is providedmvith Aasimilar recess opposed to the recess 25 and into .which the threaded pin 26 can be moved. The collet memberw24a iscutaway,V as' at 284 to provide a substantially vertical surfacel29jagainst which ,a set ,.fscrewi 36 is adaptedA to abut; forclamping the members 24, 24a together. The set screwthreadfxfedly engages -the pin'26-and1 canbe loosened to permit separation of the. members 24,:` 24a. Beneath-.thedie member-14ga vplate 3 I; is'mountedby means of a screw-32 ortho likef. 'The plate is provided with a slot 33 having aan enlarged 4gopeningwSfllat one'end thereof. 'They screw 32 ,f

@.extends'through the-slot and serves to: maintain bathe :platef- 3I inI position!! Uponv looseningofthe :screw 32,:1the plate can be shifted sorthat itcan be removed by permitting passage oifthe; screw i :head through the'enlarged opening 34.

'i :The: plate-13|A is provided with anupstanding afedge portion. 35 which extends' across Athe-body i i 'portionk andabuts.l :against:`v lthe inner.; surface. of

the collet members-1.24', 24a soto maintain'the ffcolletr'membersg abuttingv against the innerrsur f. faces` of 'the arms 22',- 22a. The'collet members i 24,-24cvl are alsoprovided"with-shoulder4 portions v 36,? l36aY whichi arezadapted. to abut v:againstv the outer surface of the arms 22, 22a, respectively. -'Therpurpose ofthis construction is to maintain the collet members in properposition. with respect totheidie member I'41so'that the tube T will be maintainedA in :exactalignment'withv the operatif .ing surface of thedie member I4.

Aufferrule` 3:1 g as particularlyshown in .Figure 4, .f is"providedwith a"cylindrical sleeve portion36 1 which surrounds the tube T. The .-sleeveportion .if 38 is provided with anoutwardly extending. shoul- :r der 39` atonezen'd. thereof :and .thisl outwardly ex- '-.tending-shoulder isplacedagainst the inner sur- .i

:'.faces of==the:colletfmembers`- 24,1. 24a. Aslshown in Fig-ure 4,; theftube T is provided with a-peripheral "groove 40 and-the tube'imay be4 positioned'so that I the opposite end ofthe sleeve portionlBBfo-the f-Ifer'rule isi disposed immediately above'the Agrove 4D or spacedinwardly thereof, as shown. The die 4'fmernberf I=4 is Lprovidedzwith 'an annular -recessed .i portion' or bore 4|.which isadapted topass over the end of the tube extending beyond .fthel groove 46 therein.

:"iThe 'tube is clamped within Ithe collet members l-orf axial,v movement relative ythereto. .'.The recess 1 or bore. isz' restricted inwardly: of the'fentrance 1^ thereof'to present .ashoulder 42. l'lhis'shoulder f- 4is-formed with oppositely inclined. inner, and outer surfaces 42a; 42D; respectively, so that. thefpointed edgefoff .the shoulder is adapted to engage the end ofthe tubelandforce theY same axially of the collet to exactlylpositiontheadjacent end. of the e: ferrule ,above -thefgroove 40- infthe-tube-g- At. therl 75 entrance of the recess or bore 4 I, the die member is shaped to .provide an internal camming surface 43 which engages the free end of the ferrule and serves to force this end of the ferrule into the groove 40 during movement of the die member, as shown in Figure 5. The camming surface 43 and the recess or bore 4| on the die member I4 are dimensioned so that the camming surface 43 will begin to force the free edge of the ferrule l0 into the groove 40 in the .tube .as the groove 46 is positioned beneath the end of the ferrule. To effect this clamping movement of the die member, sas pointed out above, the lever 2| is forced downwardly above the pivot pin 20 so that the cam ;,-.surface 2Ia engages the enlarged end I6 of the spindle I5. Upon reverse movement of the lever II, the 'spring I8 will tend to force the spindle l and: die member i4 to the retracted position shownin Figure 2. The clamping screw 36 can be released so as to permit the collet members 24, -dita to b,epivotallyj separated aboutthepins 23, :23m respectively. Thus the tube T withthe ferruleclamped thereoncan be bodilyremoved.

In the form of they inventionshown in Figure 6, the tubev does not have lany ypreformed groove therein. ,Inf this, formv of theginvention,v inward movement; of` the die ,membervv I4 .will cause ,the l cam-surfacev 43fthereont0. engage. the free end of the ferruleiso as tocause this .end of theferrule to bite into thesurface of the tubev andaslight inward movement bi1-the tube isi; effected .'by: the shoulder 42-.on thedie member. According; to Figure 7 ofgfthe. drawing,the. die member: I4, may be provided with a; central `mandrel44 which is threadablygsecured tothe die member. ,fThe man- .-'drel 44, isfadapted to extend withinthe tubeand may "be employed., to .z prevent any.. inwardf..co1 ...lapsing` oi' .the .tube iduringclamping of the .fer-

rulethereon.

. Whenfithe proper -siZe of die member and ,collet are mountedr on the-.supporting structure; I0,.the

clamping members 24,-.` 24a are moved outwardly f. .about the pivot Lpins;23,'23a, `respectivelyso'. that the tubev can, be.` inserted therebetween. The. female couplingvmember. is. rst placed over.` the tube and is ,-disposed .outside of .the supporting structure I6. :The ferrule is thenapplied tothe e inneroendv of .theitube andtheicollet members 24, 24a are brought .together .andsecured-.bythe discrew 3|).l .The ferrule. is preferably-.positioned `.with .the.. shoulder?- 39:. thereon; abutting: against the-innensurface of the .collet members 1'Ihe tube`r is preferably positioned withrthe innerend .-thereof abuttingzagainstthe shoulder42 :on the die member, although the tubemay bepositioned gwithfthe peripheral groove lilimmediately belowI the --free end of the iferrule. The die memberi I4 :f is :forced inwardly by downward movementof the handle Zigand .Whentheend of..the.tube is initiallyl positioned.v against: the ,shoulderA 42,` this vffmovement: of the-:die member will causesimilar p axial movement Aof the tubeA soas to positionthe groove 4i): properly with respect tothe free end of the ferrule.. .Continuedmovement ofthe die e5' member -will bring thecamminggsurf-ace43 into engagement with the adjacentend of --the ./ferrule .-sovas to-force the samer-into the desired .clamping-.engagement with-'the tube around the peripheral groove'il, asshown in Figurei-orthis continued movement offfthe die'emember. and. tube will cause the free end of the fferrule tobite into a tube which does not have any preformed groove ffthereon, as in Figure 6.

. AThe particular` conforma-tion. of; the :shoulder 42 is advantageous in :thatthefnarrow:centrally located shoulder portion between the inclined surfaces 42a, 42h permits tubes of different Wall thicknesses to be properly assembled with the ferrules. Thus, each tube can be positioned exactly the same distance from the camming shoulder 43 so long as some portion of the end of the tube abuts against the shoulder 43. The camming surface 43 is illustrated as being conical and' while the surface thereof is illustrated as being substantially straight, it is to be clearly understood that this surface may have a convex or concave curvature. After the ferrule has been clamped on the tube, the end of the tube will have a slight indentation corresponding to the conformation of the shoulder 42 and the diameter of this indentation may exactly t the seat in the coupling and thus assure a tight seating. As previously pointed out, the die member may carry a central mandrel M which passes within the tube and this mandrel serves to prevent the iriner surface of the tube from being forced inwardly during clamping of the ferrule thereon.

It is to be clearly understood `that various changes in the details of construction and arrangement of parts may be made without departing from the scope of the invention as set forth in the appended claims.

Having thus described the invention, I claim:

` 1` A tool for attaching a ferrule to the outer surface of a tube comprising a die member having a bore adapted to receive the end of the tube to which the ferrule is to be attached,lsaid bore being restricted inwardly of the entrance thereof to present a shoulder with which the end of the tube engages and a camming surface at the entrance of the bore adapted to engage the ferrule placed on the tube, means for supporting the tube in alignment with said bore, an abutment means engaging the outer end of the ferrule, and means for moving the die toward the abutment means for causing ferrule and tube to move endwise relative to each other and for contracting the inner end of the ferrule into` engagement with the tube.

2. A tool for attaching a ferrule to the outer surface of a tube comprising a die member having a bore adapted to receive the end of the tube to which the ferrule is to be attached, said die member having a shoulder adapted to engage the end of the tube, and a camming surface at the entrance of the bore adapted to engage the ferrule placed on the tube for contracting the inner end thereof when the ferrule is moved into the bore, a mandrel located in the bore and pro.- jecting beyond the outer end thereof and adapted to enter the tube and to contact therewith, an

.f abutment means engaging the outer end of the ferrule, and means for moving the die and abutment means relative to each other for causing a relative movement of the ferrule and tube and for contracting the end of the ferrule into engagement with the tube.

ARTHUR L. PARKER. 

